Question

I’m trying to have a dynamic table which expands on click to reveal some other content. I’ve got to the point where the table is populated with information from an NSMutableArray. I can also press each cell and it expands to double the size. Now, the next step, which is proving to be somewhat troublesome is to get it to display new/alternative text when they click on the cell. First of all, here’s my setup method:

    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

        if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];

        NSString *cellValue = [cellContent objectAtIndex:indexPath.row];
        cell.textLabel.text = cellValue;
        cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;

    }

    return cell;
}

and after this, I have the method where the cell expands on press:

    - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
    // If our cell is selected, return double height
    if([self cellIsSelected:indexPath]) {
        return kCellHeight * 2.0;
        [cellContent replaceObjectAtIndex:[self cellIsSelected:indexPath] withObject:@"NEW STUFF HERE"];
}

I must be going about this in the wrong way as nothing changes when I touch the cell. How do I get it to display new/alternative text on touch? Any help would be super, I think it’s likely to be something quite easy, but I can’t see it at the moment.

Thanks!

Answer 1

Your second method is only triggered when the cell is built or rebuilt. You need to explicitly ask it to refresh itself in the following method:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath;

And then within that method, you can call

[self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationNone];

and now your redraw methods will be triggered, so you can handle whatever you want there.